US7590712B2 - Methods and systems for management and control of an automation control module - Google Patents
Methods and systems for management and control of an automation control module Download PDFInfo
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- US7590712B2 US7590712B2 US10/238,360 US23836002A US7590712B2 US 7590712 B2 US7590712 B2 US 7590712B2 US 23836002 A US23836002 A US 23836002A US 7590712 B2 US7590712 B2 US 7590712B2
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/34—Director, elements to supervisory
- G05B2219/34038—Web, http, ftp, internet, intranet server
Definitions
- This invention relates generally to automation control modules (ACMs) and more particularly to management and control of ACMs.
- ACMs automation control modules
- PLCs Programmable logic controllers
- At least some known systems provide factory automation information using various types of communication networking environments. These networks are usually slow, are not universally accessible and are limited to monitoring and data exchange. Control may be implemented, but since the communication networks are non-deterministic, control is not in real time. Specialized industrial networks using proprietary fieldbus alternatives can be very expensive. Conversion products are required to allow information carried over those networks to be visible on a general purpose network. There may be significant installation and other deployment costs associated with the existence of such intermediate devices.
- At least some known applications and programs for ACMs are executed on general purpose computers that communicate with the ACMs over proprietary networks and protocols.
- developing and maintaining the proprietary networks and protocol increases the cost of ACM systems.
- access to ACM data is typically restricted, communication between the general purpose computer and the ACM must be handled in a secure manner. As a result, such additional security measures also increases an overall cost of the ACM systems.
- an automation control module including an ACM central processing unit (CPU) and a web system electrically coupled to the ACM CPU.
- the web system is configured to process hypertext transfer protocol (HTTP) requests from a network such that a user on the network can configure the ACM using the network.
- HTTP hypertext transfer protocol
- an automation control module (ACM) system including an ACM, a network, a computer electrically coupled to the network and configured to communicate with the network, and a web subsystem electrically coupled to the ACM and the network.
- the subsystem is configured to process hypertext transfer protocol (HTTP) requests received from the computer through the network such that the computer can configure the ACM using the network.
- HTTP hypertext transfer protocol
- a method for management and control of an automation control module (ACM) including an ACM central processing unit (CPU) and a web system electrically coupled to the ACM.
- ACM automation control module
- the web system is also electrically coupled to a network and the method includes electrically connecting the web system to the ACM CPU, and processing hypertext transfer protocol (HTTP) requests from the network using the web system such that a user on the network can configure the ACM using the network.
- HTTP hypertext transfer protocol
- FIG. 1 is a block diagram illustrating one embodiment of an ACM system of the present invention.
- FIG. 2 is a flow chart illustrating one embodiment of a method for management and control of an automation control module using an ACM system.
- ACM automation control module
- ACM refers to any device used to control the automation of an activity, including but not limited to PLCs, computer numeric controls (CNCs), motion control products, home automation products, and commercial automation products.
- ACM data includes different types of data within an ACM system 10 that control operation of ACM system 10 .
- ACM data includes, but is not limited to, user logic programs, user program memory, ACM status and statistics, ACM faults, setting ACM operating states, setting privilege levels, and any other useful ACM information.
- FIG. 1 illustrates, in block diagram form, an exemplary hardware architecture that may be utilized in conjunction with an ACM management and control system.
- the system can be implemented on many different platforms and may utilize different architectures.
- the architectures illustrated in FIG. 1 are exemplary only.
- FIG. 1 is a block diagram illustrating one embodiment of ACM system 10 .
- System 10 includes an ACM 12 , a web subsystem 14 , and a computer 16 .
- ACM 12 includes an ACM CPU 18 that executes ACM functions.
- ACM CPU 18 may execute, but is not limited to executing, user logic and function block executions, input/output (I/O) scanning, and communications to other devices.
- ACM CPU 18 includes a CPU system memory 20 that is electrically coupled to CPU 18 .
- system memory 20 includes both the operating system (not shown) for ACM CPU 18 , and a user's program and data.
- an ACM I/O backplane interface 22 is coupled to ACM CPU 18 , and provides an interface between ACM CPU 18 and an ACM backplane 24 coupled to interface 22 .
- ACM backplane 24 provides a physical and an electrical means for connecting various I/O or other input modules 26 , for example, communications or motion modules, into ACM 12 .
- ACM backplane 24 facilitates data exchanges between modules 26 and ACM CPU 18 .
- at least one module 26 provides an interface for real world inputs (not shown), such as, but not limited to the limit or proximity switch status, the position of an object, the temperature, or the pressure, to ACM CPU 18 as parameters for logic or function block execution.
- one or more modules 26 provide an interface to real world outputs (not shown) as commanded by ACM CPU 18 to control output devices (not shown)., such as, but not limited to, actuators, contactors, or solenoids.
- Network 28 includes the physical medium and intermediate devices (not shown), such as routers, and switches, that connect computer 16 to ACM 12 .
- network 28 is a wide area network (WAN), such as the Internet.
- network 28 is a local area network (LAN), such as an Intranet.
- LAN local area network
- a user 30 accesses an Intranet or the Internet to gain access to ACM 12 .
- computer 16 includes a web browser, and ACM 12 is accessible to computer 16 via the Internet.
- Computer 16 is intercoupled to the Internet through many interfaces including, but not limited to, a different network (not shown), such as a WAN or a LAN, a dial in connection, a cable modem and a high-speed ISDN line.
- Computer 16 is any device capable of interconnecting to the Internet, and may include, a web-based telephone or other web-based connectable equipment.
- Computer 16 executes a user application that makes decisions based on ACM data transferred from ACM 12 through a secure client connection through web subsystem 14 and network 28 .
- Computer 16 displays ACM data on at least one web page (not shown), and retrieves web page files (not shown) stored on a secure web server 32 embedded within web subsystem 14 .
- the web page files are text files that may contain hypertext markup language (HTML), Javascript, and/or references to other files, such as image files to be displayed with the web page or Java Applets.
- the web page files include ACM tag functions that reference ACM data stored in CPU system memory 20 .
- the tag facilitates the exchange of data between ACM CPU 18 and web server 32 embedded within web subsystem 14 .
- the tag provides a generic mechanism for user 30 to display and/or control ACM data using a standard browser.
- computer 16 includes web authoring tools and/or text editors that, along with user input, are utilized to create and modify web page files.
- Users 30 include at least one person who views and/or controls ACM data using computer 16 .
- users 30 include a person who created a web page file.
- Web subsystem 14 is electrically coupled to ACM CPU 18 , CPU system memory 20 , and network 28 .
- Subsystem 14 is shown in FIG. 1 as embedded within ACM 12 .
- subsystem 14 is contained in a separate module coupled to ACM backplane 24 .
- Web subsystem 14 includes secure web server 32 and a secure network interface 38 that provides the lower level protocols (TCP/IP) and physical hardware connections to network 28 in a secure fashion.
- Secure web server 32 is electrically coupled to network interface 38 , ACM CPU 18 , and CPU system memory 20 .
- secure web server 32 provides a secure connection between secure web server 32 and computer 16 using a secure layer, such as, but not limited to, a secure sockets layer (SSL).
- a secure layer such as, but not limited to, a secure sockets layer (SSL).
- user 30 must enter a valid user name and valid user password to access ACM 12 and web subsystem 14 .
- the user name and user password correspond to a user profile stored in secure web server 32 .
- the user name and user password serve to authenticate secure web server 32 to computer 16 or alternatively, authenticate computer 16 to secure web server 32 .
- computer 16 and secure web server 32 communicate securely using security layer encrypted messages, based on mutually agreed to session keys for encryption and decryption, through network 28 and network interface 38 .
- server 32 and computer 16 communicate to select cryptographic algorithms that both server 32 and computer 16 support.
- a user program on computer 16 generates a security layer encrypted hypertext transfer protocol (HTTP) request to access ACM data.
- HTTP hypertext transfer protocol
- Secure network interface 38 receives the request, decrypts the request and transfers the request to secure web server 32 .
- Secure web server 32 processes the security layer encrypted hypertext transfer protocol (HTTP) requests to send web pages to computer 16 and, based upon the requests, sends a web page representing the requested web page through secure network interface 38 and network 28 to computer 16 .
- HTTP security layer encrypted hypertext transfer protocol
- Secure network interface encrypts the web page representing the requested web page prior to sending it through network 28 to computer 16 .
- Computer 16 decrypts the requested web page upon receiving the requested web page.
- secure web server 32 parses and executes the tag function and either embeds ACM data within a web page file, thereby displaying the web page on a browser on computer 16 , or transmits ACM data to ACM CPU 18 .
- secure web server 32 transfers ACM data to ACM CPU 18 to control operation of ACM 12 .
- FIG. 2 is a flow chart 50 illustrating an exemplary method 52 for management and control of ACM 12 (shown in FIG. 1 ).
- Method 52 includes electrically connecting 54 web server 32 (shown in FIG. 1 ) to ACM CPU 18 (shown in FIG. 1 ).
- Web server 32 processes 56 HTTP requests from network 28 (shown in FIG. 1 ) such that a user 30 on network 28 can at least one of program and configure ACM 12 using network 28 .
- web server 32 transfers 58 web page files from web server 32 to network 28 and a user on network 28 receives 60 the web page files and uses 62 the web page files to identify a hardware configuration of ACM 12 .
- web server 32 transfers 58 web page files from web server 32 to network 28 and a user on network 28 receives 60 the web page files and uses 64 the web page files to program CPU system memory 20 .
- ACM system 10 facilitates reducing system hardware costs, shortening development time of custom ACM monitoring and control tools that reduce implementation costs, and increasing response time for accessing ACM data while reducing an impact on other critical real-time ACM functions, such as ACM sweep time, thereby reducing production costs.
- ACM system 10 facilitates rapid access to ACM data on standard devices such as a web browser on computer 16 or PDA via a standard network in a secure fashion.
- ACM system 10 also facilitates users programming and/or configuring ACM 12 using standard computer software.
Abstract
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US10/238,360 US7590712B2 (en) | 2002-09-10 | 2002-09-10 | Methods and systems for management and control of an automation control module |
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US10/238,360 US7590712B2 (en) | 2002-09-10 | 2002-09-10 | Methods and systems for management and control of an automation control module |
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US7440809B2 (en) * | 2004-07-14 | 2008-10-21 | York International Corporation | HTML driven embedded controller |
DE102004045240A1 (en) * | 2004-09-17 | 2006-03-30 | Siemens Ag | Representation of process values in automation technology |
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